CVE-2026-43656 Memory corruption in iOS and iPadOS
An out-of-bounds write in Apple operating systems allows attackers to cause unexpected app termination via maliciously crafted files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-43656?
CVE-2026-43656 is a high-severity memory corruption vulnerability in Apple Ipados, published on 11 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. Parsing a maliciously crafted file may lead to an unexpected app termination.
Weakness: CWE-787
Which versions are affected by CVE-2026-43656?
It affects 3 products.
Products include Apple Ipados, Apple Iphone Os, Apple Macos.
How do I fix CVE-2026-43656?
No fix has been published for CVE-2026-43656 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-43656 being exploited?
There is no known exploitation of CVE-2026-43656 in the wild and no public exploit code.
Other vulnerabilities in Apple Ipados
- CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write
- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write
Sources
Also known as GHSA-xfh5-8vfh-9mjc.